(19)

(11)

EP 2 701 971 A2

(12)

(88) Date of publication A3: 03.01.2013 (43) Date of publication: 05.03.2014 Bulletin 2014/10 (21) Application number: 12717571.9 (22) Date of filing: 24.04.2012

(51) International Patent Classification (IPC):  B63G 8/00(2006.01) (86) International application number: PCT/US2012/034738 (87) International publication number: WO 2012/148874 (01.11.2012 Gazette 2012/44)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 26.04.2011 US 201161479246 P (71) Applicant: BP Corporation North America Inc. Houston, TX 77079 (US)	(72) Inventors: MUNSTEREIFEL, Eric, Joseph Naperville IL 60563 (US) HUGHES, John Douglas Naperville IL 60563 (US) (74) Representative: Hamer, Christopher K. et al Mathys & Squire LLP 120 Holborn London EC1N 2SQ London EC1N 2SQ (GB)